Discrete math- Range and preimage of the floor function

Can you explain how to answer these questions i have the final answer but i don't know how they reach to it

Answer

Answers can be viewed only if
  1. The questioner was satisfied and accepted the answer, or
  2. The answer was disputed, but the judge evaluated it as 100% correct.
View the answer
Erdos Erdos
4.5K
  • Erdos Erdos
    0

    Let me know if you need any clarifications.

    • Sara Sara
      0

      Thank you! But for b in the book it says the answer is [5,7)?

    • Erdos Erdos
      0

      The answer is actually [5,7). In the last line I had written the wrong numbers. I have revised the solution.

The answer is accepted.
Join Matchmaticians Affiliate Marketing Program to earn up to 50% commission on every question your affiliated users ask or answer.